I'm trying to use Coro to implement a Perl 6-like gather { ... take() } construct.

I ran into the problem that I might have many coroutines, and I want to run one specific of them, and after then return to the main coro. 

use strict;
use warnings;
use Coro;

my $ca = async {
    print "coro a\n";
    cede;
}

my $cb = async {
    print "coro b\n";
    cede;
}

print "In main\n";
cede;
print "Back in main\n";
__END__
In main
coro b
coro a
Back in main

[download]

Here in main I call cede, but I don't seem to have control which coro should be next, and which one should be called after that.

How can I influence the call order?

I tried to fiddle a bit with priorities, setting the one that I want to call to highest, and main to second highest priority, but it didn't work for me: 

# coro definitions of $ca and $cb as above
my $main = Coro::current;

$main->prio(2);
$ca->prio(3);
cede;

print "In main\n";
__END__
In main

[download]

As you can see, no other coro is called ;( Can I somehow tweak the priority system to achieve my goal? or is there an even better way?

Update: I know solved the Problem with Coro::Channel. The result is now on CPAN: Perl6::GatherTake.

In reply to Coro: running a specific coroutine by moritz

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.